CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Oct. 31, 2011	Oct. 31, 2010
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 3,064	$ 9,453
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,662	31,166
Gain on sale of real estate, land and other investments	(589)	(5,404)
Bad debt expense	413	179
Changes in other assets and liabilities:
Increase in receivable arising from straight-lining of rents	(2,105)	(847)
Increase in accounts receivable	(2,785)	(125)
Decrease (increase) in prepaid and other assets	633	(2,185)
Increase in tax, insurance and other escrow	(427)	(1,203)
Increase in deferred charges and leasing costs	(3,422)	(2,845)
Decrease in accounts payable, accrued expenses, and other liabilities	(1,234)	(9,602)
Net cash provided by operating activities	24,210	18,587
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from real estate deposits	1,431	629
Payments for real estate deposits	(1,553)	(2,202)
Principal proceeds on mortgage loans receivable	1	1
Increase in other investments	(3)	0
Decrease in lender holdbacks for improvements	4,380	0
Proceeds from sale of real estate - discontinued operations	2,088	36,373
Proceeds from sale of real estate and other investments	284	0
Insurance proceeds received	4,148	140
Payments for acquisitions and improvements of real estate investments	(77,100)	(16,788)
Net cash (used) provided by investing activities	(66,324)	18,153
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from mortgages payable	70,745	24,325
Principal payments on mortgages payable	(39,303)	(81,699)
Principal payments on revolving line of credit and other debt	(10)	(6,550)
Proceeds from revolving line of credit and other debt	17,000	29,100
Proceeds from sale of common shares, net of issue costs	330	16,345
Proceeds from sale of common shares under distribution reinvestment and share purchase program	11,672	782
Repurchase of fractional shares and partnership units	(8)	(2)
Payments for acquisition of noncontrolling interests - consolidated real estate entities	0	(425)
Distributions paid to common shareholders, net of reinvestment of $4,870 and $5,132, respectively	(19,622)	(21,379)
Distributions paid to preferred shareholders	(1,186)	(1,186)
Distributions paid to noncontrolling interests - Unitholders of the Operating Partnership, net of reinvestment of $360 and $348, respectively	(5,609)	(6,623)
Distributions paid to noncontrolling interests - consolidated real estate entities	(362)	(518)
Distributions paid to redeemable noncontrolling interests - consolidated real estate entities	(27)	0
Net cash provided (used) by financing activities	33,620	(47,830)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(8,494)	(11,090)
CASH AND CASH EQUIVALENTS AT END OF PERIOD	41,191	54,791
CASH AND CASH EQUIVALENTS AT END OF PERIOD	32,697	43,701
SUPPLEMENTARY SCHEDULE OF NON-CASH INVESTING AND FINANCING
Distribution reinvestment plan	4,870	5,132
Operating partnership distribution reinvestment plan	360	348
Real estate investment acquired through the issuance of operating partnership units	1,974	0
Operating partnership units converted to shares	3,454	3,578
Real estate investment acquired through assumption of indebtedness and accrued costs	7,190	4,288
Adjustments to accounts payable included within real estate investments	(2,780)	(2,043)
Noncontrolling partnership interest	2,227	0
Fair value adjustments to redeemable noncontrolling interests	35	(472)
Involuntary conversion of assets due to flood damage	2,638	0
Construction debt reclassified to mortgages payable	7,190	0
Cash paid during the year for:
Interest on mortgages	29,894	32,737
Interest other	1,361	674
Cash paid during the period, total	$ 31,255	$ 33,411